Great looking Goldstar, surely it's been re-sprayed? Who ever did it, made a good job of it, but you can still see where it was originally BB.
My guess 1984.

My guess too.

About the finish, I'm betting some kind of factory refinish because :
-the pattern of the black and red are the same in the neck pocket and usual (ie a small clean rectangle in the middle)
-the codes were preserved during the refinish and someone took care to "modify" it
-the cavities have the kind of "white dust" inside and a general factory aspect
-the absence of decoloration under the PG is not contradictory with that theory as the general look is so clean and preserved.